Tube-cutter.



No. 802,215. PATENTED OCT. 1'7, 1905. E. JOHNSON TUBE CUTTER.

APPLICATION FILED AUG. 29, 1904.

W1 T [VESSES INVENTOR.

JM'W ATTORNEY.

ERIC JOHNSON, OF SEATITTLE, i VASHINGTON.

TUBIE CUTTIEW.

Specification of Letters Patent.

Patented Oct. 1'7, 1905.

Application filed August 29, 1904. Serial No. 222,585.

To ctZZ whom it may concern:

Be it known that 1, ERIC JOHNSON, a citizen of the United States, residing at Seattle, in the county of Kingand State of Washington, have invented certain new and useful Improvements in Tube-Cutters, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to improvements in tube-cutters; and the object of the invention is to provide a cutting device adapted to be inserted within a boiler-tube or similar pipe and cut it off at a suitable distance from the end with a clean sharp cut, so as to permit the removal of the tube from the boiler. To this end I provide a barrel or support adapted to be inserted in the tube from the end and a milling-cutter or its equivalent supported in such barrel, with means for moving said cutter in and out, so as to be free of the tube d uring insertion of the device in the tube, and to be then protruded, so as to engage the tube, and means for turning the whole device within the tube, so as to enable the milled cut to be carried clear around the tube and cut it off.

In the accompanying drawings, Figure 1 is a longitudinal section of the improved tubecutting device. Fig. 2 is a cross-sectional view of the same, taken on line 2 2 of Fig. 1, with the tool in extended position; and Figs. 3 and 4am elevations of the device from opposite ends.

The device comprises a barrel, plug, or support at, having a reduced end a, adapted to enter the pipe, tube, or flue to be cut, an eccentric sleeve 6, mounted to turn in the longitudinal bore of this barrel, an arbor c, mounted to turn in the bore of this sleeve, which bore is eccentric with the periphery of the sleeve, a milling-cutter (Z or equivalent rotary cutting means carried by said arbor, and handle 0 for controlling the position of the eccentric sleeve, so as to adjust the arbor and its milling-cutter in or out and likewise for turning the whole device and revolving the cutter entirely around the tube to complete the cut. A screw-pin f passes through asegmental peripheral slot g in the wall of barrel a and is fixedly secured in a screw-threaded aperture It of the sleeve 7) for the purpose of limiting the rotary movement of the latter relatively to the barrel, and holes jare provided in the periphery of the barrel to severally receive a removable pin for the purpose hereinafter set forth. To limit the extent to which the barrel may be thrust into the tube, and thus determine the point at which the latter is cut off, I provide a stop b, adjustable on the barrel by set-screw engaging in slot k.

The handle e is loosely mounted upon a collar m, which is keyed or otherwise integrally connected with the end I) of the sleeve extoriorly of the barrel, and the said collar is provided with a plurality of circumferential notches 1n. Extending axially through this handle is a rod a, terminating at its opposite ends in an enlarged head 11,, protruding from the outer extremity of the handle, and an inner flattened end a", adapted to be engaged with any of the aforesaid notches m by the resilient action of a compression-spring 0, positioned in a chambered portion of the said handle.

The device is applied to a tube or fine by pushing the barrel into the tube (indicated by T in Figs. 1 and 8) until the stop Z contacts with the end of the tube or the boiler-head, the n1illing-cutter of being previously so adjusted inwardly by means of handle 0 as to escape or be free of the flue-wall. 'If necessary, the barrel is prevented from rotating while protruding the cutter by a reverse pressure exerted upon the pin 7", held by a hand of the operator in one of the holes 7'. Then the handle e is turned in the direction of the arrows in Figs. 2 and 4, so as to press the milling-cutter against the inside of the flue, the arbor of which is driven by hand or power actuated motor devices, (not shown in the drawings,) so as to rotate the cutter, which. gradually cuts through the wall of the flue, the adjustments being such that when this result is effected the pin 7 will have reached the end of the slot (7, as shown in Fig. 2. The pin 7" is then removed from engagement with the barrel, and the handle is further turned, and thereby rotates the device as a whole to extend the mill cut clear around the flue, while the cutter is continuously rotated, thus eutting the flue completely oil". The result of this operation is a clean smooth cut, so that the flue may be drawn through the corresponding hole with a minimum of trouble.

I have "found in many cases that it is not necessary to use the pin y", the barrel holding itself in position suiiiciently for the purpose of protruding the cutter by the operator deflecting the device in order that it will bear obliquely upon the inner surface of the fluewall and which may be readily accomplished by a lateral pressure exerted by the operator upon the hand-grip sleeve '2', which is loosely mounted on the arbor. The shape of the barrel a may be varied as may be considered desirable, and to facilitate the assemblage of the several parts 'the barrel may advantageously be made of twopieces, which in practice I unite by a screw-thread cut in the adjoining ends and supplementary set-screw s. In order to accommodate the tool to different sizes of tubes, I make the end a of the barrel to different diameters and interchangeable, as required.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a tube-cutting device, the combination of a support having a reduced end eccentric to the support and adapted to be entered into the tube to be cut, a sleeve mounted to turn in said support, a rotary cutting device eccentrically mounted in said sleeve, means for limiting the movement of the said eccentric sleeve relatively of said support, and means for rotating the whole device so as to cause the milled cut to be carried entirely around the tube and cut it otl.

2. In a tube-cutting device, the combination of a support having a reduced portion eccentric to the main portion of the support and adapted to enter the pipe to be cut, means to rotate said support, a sleeve mounted in said support, means for limiting the movement of the said sleeve relatively of the support, an arbor eccentrically mounted in said sleeve, a cutting device mounted on said arbor within the end of the reduced portion of the support means for adjustingthe position of said sleeve, and means for adjusting the position of said rotary cutting device.

3. In atube-cutting device, the combination of a support havinga reduced end adapted to enter the tube to be cut, asleeve eccentrically mounted to turn in said support, an arbor rotatably mounted in and eccentric to said sleeve, a cutter mounted upon the inner end of said arbor intermediate the ends of said support, a handle adapted to be secured to the outer end of said sleeve, a pin on the said sleeve and projecting into a segmental slot of said support and adapted to limit the movement of said sleeve, and means for turning said sleeve and support simultaneously through the medium of the said handle.

4. In atube-cutting device, the combination of a support adapted to enter the tube to be out, said support being provided with a segmental slot, a sleeve eccentrically mounted to turn in said support, an arbor rotatably mounted in and eccentric to said sleeve and having its outer end projecting outwardly therefrom, a cutter mounted upon the inner end of said arbor, a handle adapted to be engaged to the outer end of said sleeve, a pin secured to said sleeve and extending into said segmental slot of the support for the purpose of limiting the movement of said sleeve, a pin adapted to be removably engaged in peripheral holes provided in the support whereby the latter can be held stationary while independent movement is given said sleeve, and a grip-handle loosely mounted on the outer end of said arbor.

5. In a tube-cutting device, the combination with an approximately cylindrical support provided with a longitudinally eccentrically arranged bore, a rotatable sleeve mounted in said bore and having its outer end extending outward beyond the support, an arbor eccentrically mounted in said sleeve and having its ends projecting beyond the said sleeve, a cutter mounted upon the inner end of said arbor intermediate the ends of said support, a handle adapted to be secured to the outer end of said sleeve whereby the same is rotated, a movable rod carried by said handle and engaging notches in the sleeve, a pin carried by the support and engaging the sleeve whereby the sleeve and support may be simultaneously rotated through the medium of said handle.

In testimony whereof I aftix my signature in presence of two witnesses.

ERIC JOHNSON. Witnesses:

PIERRE BARNES, W. A. GARLIoK. 

